Fishbed,
In what ways do you feel the finish will not hold up? I just bought the same firearm and really like it.

It seems to me like the matte finish of the heavily bead-blasted areas might be easily prone to scratching. For example, look how quickly the matte-finished plunger tube was scratched by the thumb safety in the photos above.

I've since corrected the thumb safety fit, and was able to easily buff the scratches it had created on the polished flats of the frame, but there's no easy way to remove the scratched/worn area from the plunger tube.